What is the air quality in Portsmouth today?

The current Air Quality Index (AQI) in Portsmouth is 32 (Good). PM2.5 concentration is 7.7 µg/m³.

What is the temperature in Portsmouth right now?

The current temperature in Portsmouth is 11.6°C (feels like 11.6°C). Humidity is 76.6% and wind speed is 22.5 km/h.

Is it safe to go outside in Portsmouth?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Portsmouth, United States

Cloudy

11.6°C · 76.6% humidity

11.6°

Feels 11.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

34h · 1 stn

View full history →

Portsmouth's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

76.6%

Humidity

22.5 km/h

Wind ENE

1024.2 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.7 µg/m³

PM10

27.4 µg/m³

050100150200300500

What is the weather forecast for Portsmouth?

Temperature & Precipitation

PM2.5 Trend

34h · 1 station

PM2.57.7 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Portsmouth?

10-21

23.1° 6.0°

10-22

23.5° 7.8°

10-23

19.9° 3.3°

3.5 mm

10-24

20.6° 7.0°

10-25

14.7° 4.6°

0.13 mm

10-26

20.4° 8.9°

3.06 mm

10-27

14.0° 2.5°

Both models agree Avg diff: 4.2°C

What cities are near Portsmouth?

36 Ashland 36 Meads 36 Huntington 23 Chillicothe 20 Lancaster 18 Grove City 38 Pickerington 31 Lebanon 38 Fort Thomas 36 Winchester

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T00:40 UTC.